I agree with Jayceem about the dielectrics. I do know in the case of capacitors that once they are formed-up they stay that way. I replaced some Solen caps with Hovlands once and when new they were bright and hard. After about 200 hours they smoothed out. I pop this preamp (Sonic Frontiers) in my system on occasion and it sounds fine every time.
I am now becoming suspect about cable cookers. On some cables my Audiodharma cooker makes the cables sound worse (Pure Note) on just 24 hours cook time. These cables were perfect before I re-cooked after I had my Siltechs in my system for several months. I called Pure Note and they said do not cook (they no longer use the Audiodharma). Pure Note says they have learned with their 7 nines wire that the cooker will temporarily alter the wire (makes it sound thinner) until you put several hundred system hours on them again. I believe AudioEngr (Empirical Audio) had the same findings so cooking may be a bad idea with some cables.
I am now becoming suspect about cable cookers. On some cables my Audiodharma cooker makes the cables sound worse (Pure Note) on just 24 hours cook time. These cables were perfect before I re-cooked after I had my Siltechs in my system for several months. I called Pure Note and they said do not cook (they no longer use the Audiodharma). Pure Note says they have learned with their 7 nines wire that the cooker will temporarily alter the wire (makes it sound thinner) until you put several hundred system hours on them again. I believe AudioEngr (Empirical Audio) had the same findings so cooking may be a bad idea with some cables.